Tank structure



fastening of the cover from the casing.

bolts nuts and gasket.

Patented Aug. 16, 1932 PA E OFFICE "annex nmc'rmc a muracmmeoonm. aooarom'rron or rnnnsnv'ama s'rnucmn I a plicat on med NovemberMyinvention electrical apparatus and more particularly to the tankstructure of encased eil innnersetl" electrical apparatus, such astransformers of very large K! size and capacity.

During recent years, the size of oil-immersed transformers has soincreased, that it has become customary in transformers of r H largesize to split the tank into two sections 10 for transportation orhandling, the tank being sectionalized at such an elevation that thetransformer could be shipped in the lower section thereof. Previouslythe same cover M used in the general assembly of the, trans- I formerwas used during shipment'of the lower section of the split tank. Thisnecessitated the removal of the fittings attached to the top of thetransformer, the plugging of the openings left by the fittings and theuntank at its destination reassembly of the order of the work justmenquired the reverse tioned.

In the final assembly of the tank, gas leakage is one of thedifiiculties encountered when the cover is secured by bolts. As the sizeof transformers increases, the work necessary for detaching thetransformer fitting from the tank, for shipment becomes involved andentails considerable time and expense. Sectionalizing the tank forshipment often reduces the freight charges, which are some-' times basedon the volume of the unit shipped. j g z The general object of myinvention is to I improve the structure of a sectionalized tank.

A. further object of my invention is to provide a sectionalizedtransformer tank which shall be free from leakage and economical toconstruct.

Another object of my invention is to provide a transformer tank orcasing which may be conveniently and economically disas sembled forshipment and reassembled thereafter. a

A further object is to eliminate, and, consequently, to save the costof, an angle" ring, drilling both the angle ring and cover plate,

5,;1eao. Serial m. 495,435."

- In accordancewith my invmtion, the upper end of the sections-linedtank section is closed by a cover plate, which is secured thereto bywelding while a temporary cover closes the lower section vofthesplittank duringdiipment." x..

The invention, together with additional ob:- jects and advantagesthereof, will bebetter understood from the following-description of aspecific'embodiment, when read in (3011- junction with the accompanyingdrawing in which: v Figure 1 is a view partly in'front elevation andpartly in section, showing an encased oil i-mmersed' transformerembodying any invention; i

Figure 2 isan enlarged vertical sectional vi w showing the top portionof-the split Figure "3' is a sectional view showing the lower section ofthe transformer tank closed by a temporary cover and ready for shipmentor handling.

Like reference characters indicate similar parts in the difierentfiguresof the drawing. Refening'specifically to the drawing, theapparatus shown in Fig. 1 comprises a tank 1 containing an oi l-immersedtransformer 52, enclosed by a suitable casing 3. Radiators 4 andheaders'fi of suitableconstructien may "be attached to thecasing As isusualfin afil imme'rsed transformers, there issuficient space betweenthetra-nsformer 2 and the cover '6 tooonta'in the coil necessary for thecooling of the transformer, the transformer" leads,--* bushingsandconnections (not shown). lhe Ii-upper portion 7 of'the tankisseparable from "the lower thereonas shown iii-Figs.

1 L i around the loweredge of the upper 7 isanmngle ring 8 whichprovides a laterally extending flange." The flange ofthe a le ring isprovided, with bolt holes 9 suitab y spaced for receivingconnectingbolts 1'0. RibS 12 are attached to section 7fby suitablemeans, while a cover fi is fi-rmly se- --cured, ier example,bya weld 13to ribs 12 and tlae' upper section 1', The r-i bs 12-strengthenthe-union of the cover (land theupper-section T and provide a for orrinnrsnvnnm nssmnon To w ns'rmanousi'a i the cover is. The-a4 weld 13serves also as a seal, thereby eliminating the usual gasket between thecover and the tank.

As shown in Figs. 1 and 3, an angle ring 1 1 is secured around the upperedge of the lower portion of the casing 3 at its meeting edge 16 in anysuitable manner and provides a laterally extending flange which isprovided 7, with bolt holes 17 of the same size and spacing as those ofangle ringSof the upper section 7. A temporary cover 18 isprovided foruse during shipment and storage that engages the flange 14 and is lockedthereto by" means of bolts 10, as shown in. Fig. 3. A solid temporarycover 18 is used, thus eliminating the apertures in the original coverafter the usual transformer fittings have been removed.

' Upon arrival at its destination, the temporary cover 18 is removedfrom the casing 3, and the upper section 7, with all parts attached tothe cover, as before shipment, is replaced. 7

' It will be seen, therefore, that I have provided a transformer-tankstructure, so divided into upper and lower parts that the transformermay be shipped in the lower part, immersed in oil, and the cover andupper section may be shipped with all parts attached to the cover,assembled, thereby reducing the height and volume of the units to betransported and also eliminating the inconveniences and expenseinvolved'in disassembling the fittings, leads and connections from thecover of the tank, and covering the openings thereby exposed.

Although I have shown and described cer tain specific embodiments of myinvention, I am fully aware that many modifications thereof arepossible. My invention, therefore, is not to be restricted exceptinsofar as is necessitated by the prior art and by the spirit of theappended claims.

I claim as my invention V p 1. In combination, a transformer having anenclosing split casing, a fixed cover welded to the upper edge of saidcasing, a temporary cover, and means for attaching said temporary coverto the split edge of said enclosing split casing.

2. In combination, a transformer having an enclosing casing, saidenclosing casing being divided into an upper section and a lowersection, a fixed cover welded to the upper edge of said upper section, atemporarycover, and means for attaching said temporary cover to saidlower section.

3. In combination, a transformer having an enclosing casing, saidenclosing casing being divided into an upper section and a lowersection, a fixed cover Welded to the upper edge of said upper section, aseries of rib braces around the inside top edge of said upper section,means for securing said rib braces to said upper section, a temporarycover, and

means for attaching said temporary cover to said lower section of saidenclosed casing.

4. In combination, a transformer having an enclosing casing, said casingbeing divided into an upper section and a lower section, a series of ribbraces secured around the inside top edge of said upper section, andmeans for securing said series of rib braces to said upper section, afixed cover welded to the upper edge of said upper section of saidcasing and welded to said series of rib braces, a temporary cover, andmeans for attaching said temporary cover to the lower section of thesaid casing.

In testimony whereof, I have hereunto subscribed myname this 29th day ofOctober,

FREDRICK LLEWELLYN.

